/*
 * LogFile.h 
 * Copyright (c) 2011 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


// SOL++2000
#pragma once

#include <io.h>
#include <sol\File.h>

#include <sol\String.h>


namespace SOL {

class LogFile :public File {
private:
    String fileName;
    TCHAR*  buffer;
    
    size_t BUFFER_SIZE;

public:
    LogFile(const TCHAR* filename, unsigned int buffSize=1024) 
    {
        fileName = filename;
        if (buffSize<= SIZE_1KB) {
            buffSize = SIZE_1KB;
        }
        this->BUFFER_SIZE = buffSize;
        buffer    = new TCHAR[buffSize];

    }

public:
    ~LogFile() 
    {
        delete [] buffer;
    }

public:
    int printf(TCHAR* format,...) 
    {
        va_list pos;
        va_start(pos, format);
        //vsprintf_s(this->buffer, this->BUFFER_SIZE, format, pos);
        _vsnprintf(this->buffer, this->BUFFER_SIZE, format, pos);
        va_end(pos);
          
        int len = 0;
   
        BOOL rc = create(fileName,  
               GENERIC_READ|GENERIC_WRITE,    // access mode 
               FILE_SHARE_READ|FILE_SHARE_WRITE,// share mode 
               NULL,                        // security descriptor 
               OPEN_ALWAYS,                    // how to create 
               FILE_ATTRIBUTE_NORMAL,        // file attributes 
               NULL);                        // attributes to copy  
        if (rc) {
            // Move write-position to the end of this file.
            seek(0, FILE_END);        
            len = write(buffer, strlen(buffer));
            close();
        }
        return len;
    }

/*
    LogFile(const TCHAR* filename, unsigned int buffSize = 1024);

    ~LogFile();
 
    int printf(TCHAR* format,...);
    */
};

}